It seems 30.0.1 had issues with compatibility with JDK 8 and 11, which appear to be solved in 30.0.3 as per godotengine/godot-docs#4796.
It seems 30.0.1 had issues with compatibility with JDK 8 and 11, which appear to be solved in 30.0.3 as per godotengine/godot-docs#4796.